This page explains the various SketchUp components included with the tool and what they represent.
BillboardQuad
Used to represent Old Billboard Quads.
Camera
Used with the AnimatedCamera group tag to represent a position for the camera.
CollisionBox
Used to represent Collision Oriented Bounding Boxes inside various types of structures.
CollisionCylinder
Used to represent Collision Cylinders inside various types of structures.
CollisionSphere
Used to represent Collision Spheres inside various types of structures.
Locator
Used to represent Locators and positions inside groups using Locator group tags.
RectTriggerVolume
Used to represent rectangular Trigger Volumes inside groups using Locator group tags.
SphereTriggerVolume
Used to represent spherical Trigger Volumes inside groups using Locator group tags.